CN215120570U - Low standby power consumption DC-DC converter - Google Patents
Low standby power consumption DC-DC converter Download PDFInfo
- Publication number
- CN215120570U CN215120570U CN202121176864.0U CN202121176864U CN215120570U CN 215120570 U CN215120570 U CN 215120570U CN 202121176864 U CN202121176864 U CN 202121176864U CN 215120570 U CN215120570 U CN 215120570U
- Authority
- CN
- China
- Prior art keywords
- converter
- power consumption
- circuit
- control circuit
- field effect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model discloses a low standby power consumption DC-DC converter, which comprises a DC-DC conversion circuit and a low power consumption control circuit, wherein the low power consumption control circuit comprises a switch circuit and a control circuit; the control circuit is provided with a whole vehicle ON/OFF control signal input end; the switching circuit is connected with the DC-DC conversion circuit in series, and the control circuit can control the switching circuit to be switched ON or switched OFF according to the ON/OFF control signal of the whole vehicle; the input cathode of the DC-DC converter and the cathode of the battery are connected in series with a field effect tube, the field effect tube of the DC-DC converter is in a turn-off state when the electric vehicle is in standby (not riding), and the DC-DC converter cuts off input power supply, so that the DC-DC converter is free of loss when the electric vehicle is in standby.
Description
Technical Field
The utility model relates to a DC-DC converter technical field, concretely relates to low stand-by power consumption DC-DC converter.
Background
The DC-DC converter is a commonly used electronic device on an electric vehicle, and is mainly used for converting high-voltage direct current (42-120V) generated by a large battery on the electric vehicle into low-voltage direct current (10-15V) to be used by a 12V standby battery of the electric vehicle and low-voltage loads such as headlights, instrument lamps, steering lamps and the like.
When the existing electric vehicle is in a standby state (not riding), the DC-DC converter is still connected with the battery of the electric vehicle and is in the standby state, the standby power consumption of the existing DC-DC converter is large, and after the electric vehicle is placed for a period of time, the battery of the electric vehicle is lack of power due to the loss of the DC-DC converter, so that the endurance capacity of the electric vehicle is influenced.
Disclosure of Invention
To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to solve the problem that the standby power consumption of the existing DC-DC converter is large so as to influence the battery loss of the electric vehicle during standby (not riding), and the low-power-consumption DC-DC converter is provided so as to reduce the battery loss of the electric vehicle during standby.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a low standby power consumption DC-DC converter comprises a DC-DC conversion circuit and a low power consumption control circuit, wherein the low power consumption control circuit comprises a switch circuit and a control circuit; the control circuit is provided with a whole vehicle ON/OFF control signal input end; the switching circuit is connected with the DC-DC conversion circuit in series, and the control circuit can control the switching circuit to be switched ON or switched OFF according to the ON/OFF control signal of the whole vehicle.
Further, the switch circuit comprises a field effect transistor Q1, wherein the source electrode of the field effect transistor Q1 is used for being connected with the negative electrode of the power supply, the drain electrode of the field effect transistor Q1 is connected with the negative electrode of the DC-DC conversion circuit, and the grid electrode of the field effect transistor Q1 is used for being connected with the negative electrode of the power supply after passing through a resistor R1.
Further, the control circuit comprises a photoelectric coupler IC1 and a triode Q2, wherein the anode of a light emitting diode of the photoelectric coupler IC1 is used for inputting a vehicle ON/OFF control signal, and the cathode of the light emitting diode is grounded; an emitter of the photoelectric coupler IC1 is used for being connected with a negative electrode of a power supply, and a collector of the photoelectric coupler IC1 is connected with a base electrode of a triode Q2 after passing through a resistor R4; the emitter of the triode Q2 is connected with the resistor R2 and then used for being connected with the positive electrode of the power supply, and the collector of the triode Q2 is connected with the grid of the field effect transistor Q1.
Further, a bias resistor R3 is provided between the emitter and the base of the transistor Q2.
Furthermore, the device also comprises a voltage stabilizing diode Z1, wherein the cathode of the voltage stabilizing diode Z1 is connected with the collector of the triode Q2, and the anode of the voltage stabilizing diode Z1 is used for being connected with the negative pole of the power supply.
Further, the ON/OFF control signal is a high level signal/a low level signal.
Compared with the prior art, the beneficial effects of the utility model are that:
the input cathode of the DC-DC converter is connected with a field effect tube in series, the field effect tube of the DC-DC converter is in a turn-off state when the electric vehicle is in standby (not riding), and the DC-DC converter cuts off input power supply, so that the DC-DC converter is free of loss when the electric vehicle is in standby.
Drawings
FIG. 1 is a schematic diagram of a low power consumption control circuit of the present invention;
fig. 2 is a block diagram of the DC-DC converter with low standby power consumption according to the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example (b):
as shown in fig. 1-2, a low standby power consumption DC-DC converter includes a DC-DC conversion circuit, and further includes a low power consumption control circuit, where the low power consumption control circuit includes a switch circuit and a control circuit; the control circuit is provided with a whole vehicle ON/OFF control signal input end; the switching circuit is connected with the DC-DC conversion circuit in series, and the control circuit can control the switching circuit to be switched ON or switched OFF according to the ON/OFF control signal of the whole vehicle. The switching circuit comprises a field effect transistor Q1, wherein the source electrode of the field effect transistor Q1 is used for being connected with the negative electrode of a power supply, the drain electrode of the field effect transistor Q1 is connected with the negative electrode of the DC-DC conversion circuit, and the grid electrode of the field effect transistor Q1 is used for being connected with the negative electrode of the power supply after passing through a resistor R1. The control circuit comprises a photoelectric coupler IC1 (NPN triode output type) and a triode Q2, wherein the anode of a light emitting diode of the photoelectric coupler IC1 is used for inputting a finished vehicle ON/OFF control signal, and the cathode of the light emitting diode is grounded or the cathode of an electric vehicle; an emitter of the photoelectric coupler IC1 is used for being connected with a negative electrode of a power supply, and a collector of the photoelectric coupler IC1 is connected with a base electrode of the triode Q2 after passing through the resistor R4; the emitter of the triode Q2 is connected with the resistor R2 and then used for being connected with the positive electrode of the power supply, and the collector of the triode Q2 is connected with the grid of the field effect transistor Q1. A bias resistor R3 is also provided between the emitter and base of transistor Q2. The device also comprises a voltage stabilizing diode Z1, wherein the cathode of the voltage stabilizing diode Z1 is connected with the collector of the triode Q2, and the anode of the voltage stabilizing diode Z1 is used for being connected with the negative pole of the power supply.
As shown in fig. 1, when in use, a source of a field effect transistor Q1 in the low power consumption control circuit is connected with a negative electrode of a lithium battery of an electric vehicle, a drain of Q1 is connected with a negative electrode (PGND) of a DC-DC conversion circuit, a grid of Q1 is connected with a battery ground through a resistor R1, a zener diode Z1 is connected in parallel with R1, a grid of Q1 is connected with a collector of Q2, an emitter of Q2 is connected with a positive electrode of the battery through R2, an emitter of Q2 is connected with a base of Q2 through R3, a base of Q2 is connected with a pin (collector of a photo-electric coupler IC 14) through R4, a pin (emitter of a photo-electric transistor) of an IC 13 is connected with a negative electrode of the battery, a pin (anode of a light emitting diode) of an IC 11 is connected with an ON/OFF control signal through R5, and a pin (cathode of the light emitting diode) of the IC 12 is connected with a negative electrode of the electric vehicle.
During working, an ON/OFF control signal of the whole vehicle sends out a high level (2-50V), an IC1 light emitting diode is conducted to enable a phototriode to be conducted, a lithium battery anode → R2 → Q2 emitter-base → R4 → IC 14 pin-3 → lithium battery cathode forms a loop, Q2 is conducted, wherein R3 is Q2 base-emitter bias resistance, the lithium battery anode → R2 → Q2 emitter-collector → R1 → battery cathode forms a loop, voltage is provided for the base of Q1, Z1 is used for stabilizing Q1 grid voltage, the Q1 grid is conducted by obtaining the voltage, the battery cathode is connected with the internal cathode of the DC-DC converter, and working voltage is provided for the DC-DC converter to enable the DC-DC converter to work normally.
When the electric vehicle is in a dormant state, the ON/OFF control signal of the electric vehicle outputs a low level (below 0.5V), the IC1 cannot be conducted, the Q2 cannot be conducted, the grid of the Q1 has no power supply voltage, and the Q1 is in a cut-OFF state, so that the negative electrode of the battery is disconnected with the negative electrode inside the DC-DC converter, and the DC-DC is in the dormant state when stopping working. At this time, the static current of the DC-DC converter is Q1 leakage current, and the Q1 leakage current is very small (less than 100 uA), so the static current of the DC-DC converter is small when in standby, and the requirement of low power consumption is met.
Adopt the utility model discloses, DC-DC converter input negative pole is in the off-state through concatenating a field effect transistor, DC-DC converter field effect transistor when the electric motor car standby (not riding), and the DC-DC converter cuts off the input power supply to DC-DC converter is lossless when making the electric motor car standby.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the applicant has described the present invention in detail with reference to the preferred embodiments, those skilled in the art should understand that those modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (6)
1. A low standby power consumption DC-DC converter comprises a DC-DC conversion circuit and is characterized by also comprising a low power consumption control circuit, wherein the low power consumption control circuit comprises a switch circuit and a control circuit; the control circuit is provided with a whole vehicle ON/OFF control signal input end; the switching circuit is connected with the DC-DC conversion circuit in series, and the control circuit can control the switching circuit to be switched ON or switched OFF according to the ON/OFF control signal of the whole vehicle.
2. The DC-DC converter with low standby power consumption of claim 1, wherein the switching circuit comprises a field effect transistor Q1, the source of the field effect transistor Q1 is used for connecting with the negative pole of the power supply, the drain of the field effect transistor Q1 is connected with the negative pole of the DC-DC converter circuit, and the grid of the field effect transistor Q1 is connected with the negative pole of the power supply after passing through a resistor R1.
3. The DC-DC converter with low standby power consumption according to claim 2, wherein the control circuit comprises a photocoupler IC1 and a triode Q2, the positive electrode of a light emitting diode of the photocoupler IC1 is used for inputting a vehicle ON/OFF control signal, and the negative electrode of the photocoupler IC1 is grounded; the emitter of the optical coupler IC1 is used for being connected with the negative pole of a power supply, and the collector of the optical coupler IC1 is connected with the base of a triode Q2 after passing through a resistor R4; the emitter of the triode Q2 is connected with the resistor R2 and then used for being connected with the positive electrode of the power supply, and the collector of the triode Q2 is connected with the grid of the field effect transistor Q1.
4. The DC-DC converter with low standby power consumption according to claim 3, wherein a bias resistor R3 is further provided between the emitter and the base of the transistor Q2.
5. The DC-DC converter with low standby power consumption of claim 1, further comprising a Zener diode Z1 having a cathode connected to the collector of the transistor Q2 and an anode for connecting to the negative terminal of the power supply.
6. The DC-DC converter with low standby power consumption according to claim 1, wherein the ON/OFF control signal is a high level signal/a low level signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121176864.0U CN215120570U (en) | 2021-05-28 | 2021-05-28 | Low standby power consumption DC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121176864.0U CN215120570U (en) | 2021-05-28 | 2021-05-28 | Low standby power consumption DC-DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215120570U true CN215120570U (en) | 2021-12-10 |
Family
ID=79301266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121176864.0U Active CN215120570U (en) | 2021-05-28 | 2021-05-28 | Low standby power consumption DC-DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215120570U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116247781A (en) * | 2023-05-09 | 2023-06-09 | 合肥安轩能源有限公司 | Low-power consumption power supply circuit of high-voltage lithium battery BMS |
-
2021
- 2021-05-28 CN CN202121176864.0U patent/CN215120570U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116247781A (en) * | 2023-05-09 | 2023-06-09 | 合肥安轩能源有限公司 | Low-power consumption power supply circuit of high-voltage lithium battery BMS |
| CN116247781B (en) * | 2023-05-09 | 2023-07-11 | 合肥安轩能源有限公司 | Low-power consumption power supply circuit of high-voltage lithium battery BMS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110588542B (en) | Control circuit and control method for low-power-consumption self-awakening of vehicle-mounted power supply | |
| CN201854007U (en) | High-precision overcurrent protection circuit | |
| CN203858468U (en) | Air conditioner standby power consumption control circuit and air conditioner | |
| CN110784201A (en) | NMOS switch drive circuit and power supply device | |
| CN215120570U (en) | Low standby power consumption DC-DC converter | |
| CN109742938B (en) | Anti-interference delay start control circuit and system | |
| CN212660143U (en) | Power on-off control circuit and electronic equipment | |
| CN112636434A (en) | Pre-charging circuit suitable for high-voltage direct-current bus capacitor | |
| CN210490527U (en) | Dummy load energy-saving charger circuit | |
| CN210225033U (en) | Switching circuit for charging circuit | |
| CN209930225U (en) | MOS tube driving circuit | |
| CN210083414U (en) | Brake lamp control system for electric vehicle | |
| CN203691701U (en) | Device for controlling input surge current of LED module | |
| CN220896541U (en) | Compatible high pulse and low pulse power management enable circuit | |
| CN220325296U (en) | Power-on and power-off management circuit for controlling battery output | |
| CN219498950U (en) | Battery low voltage protection circuit and PCB board | |
| CN215870903U (en) | Power supply switching circuit and 5G terminal adopting same | |
| CN210725422U (en) | LED drive circuit | |
| CN220673376U (en) | Power supply voltage protection circuit | |
| CN218213842U (en) | Key awakening circuit applied to frame circuit breaker | |
| CN211009228U (en) | Fan energy-saving control circuit and testing device | |
| CN211525052U (en) | Novel pump spraying control circuit | |
| CN219123916U (en) | Voltage limiting protection circuit | |
| CN209748409U (en) | Power supply conversion circuit capable of outputting stable voltage | |
| CN221380765U (en) | Switching tube conduction time limiting circuit and switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |